CN209799930U - While-drilling vibration energy harvester - Google Patents
While-drilling vibration energy harvester Download PDFInfo
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- CN209799930U CN209799930U CN201920247408.7U CN201920247408U CN209799930U CN 209799930 U CN209799930 U CN 209799930U CN 201920247408 U CN201920247408 U CN 201920247408U CN 209799930 U CN209799930 U CN 209799930U
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- well pipe
- shell
- drilling
- casing
- inner ring
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Abstract
The utility model provides a vibration energy harvester while drilling, which comprises an upper cylinder body, a lower cylinder body and an energy harvesting disc, wherein the upper cylinder body comprises an upper shell, the upper end of the upper shell is provided with an upper drill rod joint, the interior of the upper shell is provided with an upper well pipe, the lower cylinder body comprises a lower shell, the lower end of the lower shell is provided with a lower drill rod joint, the interior of the lower shell is provided with a lower well pipe, the energy harvesting disc is fixed on the lower well pipe, the upper end of the lower well pipe is connected with the lower end, the upper shell is connected with the lower shell to form a shell, the energy capturing disc is positioned in the shell and comprises an inner ring, the surface of the inner ring is provided with a capacitor, a plurality of cantilever beams are arranged around the inner ring, each cantilever beam is provided with a piezoelectric plate, and one end of each cantilever beam is connected with a mass block, the other end of each cantilever beam is connected with a capacitor, the upper drill rod joint is used for connecting the lower end of a drill rod, the lower drill rod joint is used for connecting the upper end of another drill rod, and the capacitor collects charges generated by all the pressure variable pieces. The utility model has the advantages that: the device can generate electric energy efficiently and is more suitable for the field of drilling.
Description
Technical Field
The utility model relates to a drilling equipment technical field especially relates to a vibration energy harvester of formula along with boring.
Background
The existing piezoelectric material energy harvester mainly adopts a cantilever structure, and mainly comprises a mass block, a cantilever, a piezoelectric plate, a capacitor and the like. When the cantilever is driven to vibrate by the mass block under the action of an external force, the piezoelectric sheet attached to the cantilever is deformed to generate electric charges, and the electric charges are collected by the capacitor.
In the drilling process, particularly in the rock drilling process, the drill rod is continuously vibrated due to the impact action of the drill bit, the vibration drives the cantilever where the piezoelectric material is located to vibrate, and the piezoelectric material is pressed due to the tension action to generate electricity, so that the vibration is theoretically feasible to be converted into electric energy through the piezoelectric energy harvester. However, most of the existing energy harvester models are single-arm, and the cantilever is long; in the drilling engineering, the aperture is generally not more than 450mm, the length of a cantilever of the energy harvester while drilling is limited due to the limitation of the diameter of a well head, and the underground working condition is complex, so that the energy harvester is required to have the characteristics of simple structure, firmness, durability, convenience in repair and maintenance. It is thus seen that the conventional structure of the single arm is not suitable for use in the drilling industry and needs to be improved.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a vibration energy harvester while drilling.
An embodiment of the utility model provides a vibration energy harvester along with boring formula, including last cylinder body, lower cylinder body and energy harvesting dish, go up the cylinder body and include the upper casing, upper casing upper end is equipped with the tool joint, and inside is equipped with the upper portion well casing, the lower cylinder body includes the lower casing, lower casing lower extreme is equipped with the tool joint, and inside is equipped with the lower part well casing, the energy harvesting dish is fixed in on the lower part well casing, lower part well casing upper end is connected the upper portion well casing lower extreme, and the upper casing is connected the lower casing forms the casing, the energy harvesting dish is located in the casing, the energy harvesting dish includes the inner ring, the inner ring surface is equipped with the condenser, is equipped with a plurality of cantilever beams around the inner ring, be equipped with a piezoelectric patch on each cantilever beam, and each cantilever beam one end connects a quality piece, and the other end all connects the condenser, the tool joint is used for connecting a, the lower drill rod joint is used for being connected with the upper end of another drill rod, when the two drill rods drill, the upper well pipe and the lower well pipe vibrate to drive all the mass blocks to vibrate, each cantilever beam vibrates, the piezoelectric sheet on the cantilever beam deforms to generate charges, and the capacitor collects all the charges.
Furthermore, the upper casing is of a pipe body structure, the axis of the upper casing coincides with the axis of the upper well pipe, an external thread joint is arranged at the lower end of the upper casing, and the upper well pipe penetrates through the external thread joint and the upper end of the upper well pipe is connected with the upper drill rod joint.
Furthermore, the lower shell is of a pipe body structure, the axis of the lower shell coincides with the axis of the lower well pipe, an internal thread joint is arranged at the upper end of the lower shell, the upper end of the lower well pipe penetrates through the internal thread joint, and the internal thread joint is connected with the external thread joint, so that the upper shell is connected with the lower shell to form the shell.
Furthermore, the outer wall of the upper end of the lower well pipe is provided with an external thread, the inner wall of the inner ring is provided with an internal thread, the inner ring is sleeved on the lower well pipe, the internal thread is matched with the external thread, and the energy capturing disc is inserted into the upper shell.
Further, the outer diameter of the upper well pipe is larger than the inner diameter of the lower well pipe, and the lower part of the upper well pipe is inserted into the upper part of the lower well pipe in an interference fit manner.
Furthermore, four cantilever beams are uniformly distributed around the inner ring.
Further, the mass blocks are arch-shaped mass blocks, and each mass block is coincident with the inner ring axis.
further, the capacitor is connected with the measurement while drilling equipment and used for supplying power to the measurement while drilling equipment.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the utility model discloses a vibration energy harvester of following drill formula, the disc structure design of energy harvesting dish, make full use of the inside annular space of well drilling well hole, can produce the electric energy more high-efficiently, compare in traditional long single cantilever type structure more be suitable for the probing field, go up threaded connection between cylinder body and the lower cylinder body, convenient to detach, and can play good guard action to inside energy harvesting dish to the complicated operating mode in the pit of creeping into the in-process, upper portion well casing and lower part well casing adopt interference fit to nest, both guaranteed linking up in the inside water route of drilling rod, again can conveniently dismantle the maintenance, energy harvesting dish and lower part well casing threaded connection, convenient to detach changes.
Drawings
Fig. 1 is a schematic view of a vibration energy harvester of the while-drilling type according to the present invention;
Fig. 2 is a schematic view of the upper cylinder block 1 of fig. 1;
FIG. 3 is a schematic view of the middle lower cylinder 2 of FIG. 1;
FIG. 4 is a front view of the middle capture disk 3 of FIG. 1;
FIG. 5 is a top view of the middle capture disk 3 of FIG. 1;
FIG. 6 is an equivalent model diagram of the energy harvesting disk 3 of FIG. 1;
Fig. 7 is an equivalent circuit diagram of a vibration energy capture device of a while-drilling vibration energy harvester of the present invention.
in the figure: 1-upper cylinder, 11-upper shell, 12-upper drill rod joint, 13-upper well pipe, 14-external thread joint, 2-lower cylinder, 21-lower shell, 22-lower drill rod joint, 23-lower well pipe, 24-internal thread joint, 25-external thread, 3-energy capturing disc, 31-inner ring, 32-capacitor, 33-cantilever beam, 34-mass block and 35-internal thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
referring to fig. 1, an embodiment of the present invention provides a vibration energy harvester while drilling, including an upper cylinder 1, a lower cylinder 2, and an energy harvesting disk 3.
Referring to fig. 2, the upper cylinder 1 includes an upper housing 11, the upper housing 11 is a tubular structure and has a closed upper end, an upper drill rod joint 12 is disposed at the upper end of the upper housing 11, the upper drill rod joint 12 is welded to the center of the upper end of the upper housing 11, the upper drill rod joint 12 is connected to a lower end of a drill rod by welding, an external thread joint 14 is disposed at the lower end of the upper housing 11, an upper well pipe 13 is disposed inside the upper housing 11, the upper well pipe 13 coincides with the axis of the upper housing 11, the upper end of the upper well pipe 13 is welded to and communicated with the upper drill rod joint 12, and the lower end of the upper well pipe 13 penetrates through the external thread joint 14 and extends downward.
referring to fig. 3, the lower cylinder 2 includes a lower casing 21, the lower casing 21 is of a tubular structure and has a sealed lower end, the lower end of the lower casing 21 is provided with a lower drill pipe joint 22, the lower drill pipe joint 22 is welded to the center of the lower end of the lower casing 21, the lower drill pipe joint 22 can be connected to the upper end of another drill pipe by welding, a lower well casing 23 is provided inside the lower casing 21, the lower well casing 23 coincides with the axis of the lower casing 21, the lower end of the lower well casing 23 is welded to and communicated with the lower drill pipe joint 22, the upper end of the lower casing 21 is provided with an internal thread joint 24, the upper portion of the lower well casing 23 penetrates through the internal thread joint 24 and extends upward, the portion of the upper well casing 23 extending out of the internal thread joint 24 is provided with an external thread 25, the outer diameter of the upper well casing 13 is larger than the inner diameter, so that the upper housing 11 is connected with the lower housing 21 to form the housing, the interior of the housing is sealed, and the lower part of the upper well pipe 13 is inserted into the upper part of the lower well pipe 23 and is in interference fit with the lower well pipe.
Referring to fig. 4 and 5, the energy capturing disc 3 is disposed in the casing, the energy capturing disc 3 includes an inner ring 31, an inner wall of the inner ring 31 is provided with an internal thread 35, the inner ring 31 is sleeved on the lower well pipe 23, the internal thread 35 is matched with the external thread 25, the energy capturing disc 3 is inserted into the upper casing 11, a capacitor 32 is fixedly disposed on a surface of the inner ring 31, a plurality of cantilever beams 33 are disposed around the inner ring 31, in this embodiment, four cantilever beams 33 are disposed, the four cantilever beams 33 are uniformly surrounded on the inner ring 31, two cantilever beams are symmetrically distributed, each cantilever beam 33 is provided with a piezoelectric plate, one end of each cantilever beam 33 is connected to a mass block 34, and the other end is connected to the capacitor 32, in this embodiment, the mass block 34 is an arc-shaped mass block, and each mass block 34 is coincident with an axis of the inner ring 31, this makes the structure of the energy capturing disc 3 more robust.
The utility model discloses a vibration energy harvester along with boring formula is following two when the drilling rod creeps into, upper portion well casing 13 with lower part well casing 23 all vibrates, drives all masses 34 vibrations, each on cantilever beam 33 vibration and this cantilever beam 33 the piezoelectric plate takes place to deform and produces the electric charge, all electric charges are collected to condenser 32. The capacitor 32 may also be connected to a measurement-while-drilling device for powering the measurement-while-drilling device.
the following explains the application effect of the vibration energy harvester:
Firstly, one cantilever beam 33 of the four cantilever beams 33 of the vibration energy harvester is selected as a theoretical calculation object for calculation.
The cantilever beam 33, the mass block 34 and the capacitor are replaced by a theoretical model shown in fig. 6, the piezoelectric sheet outputs alternating current, whether an AC-DC conversion device is added or not can be selected according to the power supply type required by an underground measuring instrument in practical application, and a relatively mature cantilever beam type piezoelectric vibration energy capturing device circuit equivalent model (wherein an amplifying circuit uses a load resistor R) is adopted at this timeLInstead), the test circuit is as shown in fig. 7.
According to the equivalent circuit model shown in fig. 7, assuming that the rectifier diodes are ideal, i.e. there is no tube voltage drop, the circuit equations can be listed as follows, ignoring the harmonic effect, etc
In the formula hplet Le be the piezoelectric layer thickness, b the piezoelectric layer width, and ε the dielectric constant of the piezoelectric layer under normal stress conditions.
Because the value of the voltage-stabilizing capacitor is large and the voltage at two ends of the voltage-stabilizing capacitor is unidirectional direct current, the ripple of RC charge and discharge is not large at the moment. And the ripple effect is less for resistive loads. Thus, without assuming steady state, ripple on RC charge and discharge is ignored, assuming UoIs a constant value.
on the basis of the above assumptions, it can be further concluded that, when the rectifier bridge is conducting:
|Uo|＝|Up| (4)
From the formula (3) to obtain CpThe formula can be applied only by relating to the material and the size of the piezoelectric sheet
Calculating the excitation angular frequency omega related to the vibration amplitude of the piezoelectric sheet driven by the mass block, taking the special condition of phi equal to 90 degrees for calculation, and calculating the frequency due to CpMinimum (10)-8Order of magnitude), can be ignored in the calculation, so equation (5) can be simplified to
The piezoelectric material Z0.2T30 x 30S-SY1-C82 is taken as an example for calculation, the specific parameter Cp is 91nF, and the diameter of an open hole well is 444.5mm, the three-opening aperture is about 216mm, the influence of the thickness of the shell and the mass block 34 is considered, the length of the cantilever beam 33 is 90-180mm, the width and the thickness of the cantilever beam 33 are set to be 80mm multiplied by 3mm, so Am is about 0.141-0.282mA, and as the energy harvesting disks are four arms and the upper end and the lower end of the cantilever beam 33 are provided with the piezoelectric sheets, the vibration energy harvester provided with the single energy harvesting disk is theoretically U-shapedzmax＝8Uo＝1.43*10-3RL(V). Under the condition of connecting an amplifying circuit, the device can collect energy generated by vibration of the drilling tool, and the purposes of relieving the pressure of the battery pack and reducing energy consumption are achieved to a certain extent.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A vibration energy harvester while drilling is characterized in that: the energy harvesting device comprises an upper cylinder body, a lower cylinder body and an energy harvesting disc, wherein the upper cylinder body comprises an upper shell, an upper drill rod joint is arranged at the upper end of the upper shell, an upper well pipe is arranged in the upper shell, a lower shell is arranged at the lower end of the lower shell, a lower well pipe is arranged in the lower shell, the energy harvesting disc is fixed on the lower well pipe, the upper end of the lower well pipe is connected with the lower end of the upper well pipe, the upper shell is connected with the lower shell to form the shell, the energy harvesting disc is positioned in the shell and comprises an inner ring, a capacitor is arranged on the surface of the inner ring, a plurality of cantilever beams are arranged around the inner ring, each cantilever beam is provided with a piezoelectric plate, one end of each cantilever beam is connected with a mass block, the other end of each cantilever beam is connected with the capacitor, the upper drill rod joint is used for, when the two drill rods drill, the upper well pipe and the lower well pipe vibrate to drive all the mass blocks to vibrate, each cantilever beam vibrates, the piezoelectric plate on the cantilever beam deforms to generate charges, and the capacitor collects all the charges.
2. The vibration energy harvester while drilling of claim 1, wherein: the upper casing is of a pipe body structure, the upper casing is overlapped with the axis of the upper well pipe, an external thread joint is arranged at the lower end of the upper casing, the upper well pipe penetrates through the external thread joint, and the upper end of the upper well pipe is connected with the upper drill rod joint.
3. the vibration energy harvester while drilling of claim 2, wherein: the lower casing is of a pipe body structure, the lower casing and the axis of the lower well pipe coincide, an internal thread joint is arranged at the upper end of the lower casing, the upper end of the lower well pipe penetrates through the internal thread joint, and the internal thread joint is connected with the external thread joint, so that the upper casing is connected with the lower casing to form the casing.
4. The vibration energy harvester while drilling of claim 3, wherein: the outer wall of the upper end of the lower well pipe is provided with an external thread, the inner wall of the inner ring is provided with an internal thread, the inner ring is sleeved on the lower well pipe, the internal thread is matched with the external thread, and the energy capturing disc is inserted into the upper shell.
5. The vibration energy harvester while drilling of claim 4, wherein: the outer diameter of the upper well pipe is larger than the inner diameter of the lower well pipe, the lower part of the upper well pipe is inserted into the upper part of the lower well pipe, and the upper well pipe and the lower well pipe are in interference fit.
6. The vibration energy harvester while drilling of claim 1, wherein: four cantilever beams which are uniformly distributed are arranged around the inner ring.
7. The vibration energy harvester while drilling of claim 1, wherein: the mass blocks are arch-shaped mass blocks, and each mass block is coincided with the inner ring axis.
8. The vibration energy harvester while drilling of claim 1, wherein: the capacitor is connected with the measurement-while-drilling equipment and used for supplying power to the measurement-while-drilling equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247408.7U CN209799930U (en) | 2019-02-27 | 2019-02-27 | While-drilling vibration energy harvester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247408.7U CN209799930U (en) | 2019-02-27 | 2019-02-27 | While-drilling vibration energy harvester |
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| CN209799930U true CN209799930U (en) | 2019-12-17 |
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| CN201920247408.7U Expired - Fee Related CN209799930U (en) | 2019-02-27 | 2019-02-27 | While-drilling vibration energy harvester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763792A (en) * | 2019-02-27 | 2019-05-17 | 中国地质大学（武汉） | A kind of vibration energy accumulator with the formula of boring |
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2019
- 2019-02-27 CN CN201920247408.7U patent/CN209799930U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109763792A (en) * | 2019-02-27 | 2019-05-17 | 中国地质大学（武汉） | A kind of vibration energy accumulator with the formula of boring |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20210227 |
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| CF01 | Termination of patent right due to non-payment of annual fee |